An apparatus for the production of gasolines with a low sulphur content
from a catalytic cracking gasoline, comprising a fractionation column (1)
provided with a line (2) for introducing raw gasoline from a catalytic
cracking step and comprising at least two lines, one (3) in the upper
portion of the column for taking off a light cut, and the other (4) in the
lower portion of the column for taking off the heavy cut; a zone (5) for
hydrotreatment in the presence of hydrogen, comprising a catalytic bed, an
inlet line (6) for the light gasoline cut to be treated, said line being
connected either to the fractionation column (I), or to the zone (7) for
treatment over a palladium catalyst, said hydrotreatment zone also
comprising an outlet line (8) for hydrotreated effluent; a stripping zone
(9) comprising a line for introducing light hydrotreated gasoline, a line
(10) for evacuating H.sub.2 S and an outlet line (11) for stripped light
gasoline; and said apparatus also comprising at least one of the following
sweetening zones: a sweetening zone (12) located after the stripping zone,
comprising a line for introducing the stripped light gasoline and a line
(14) for supplying an oxidizing agent to said zone; a treatment zone (7)
located after the hydrotreatment zone and comprising a line (3) for
introducing the light gasoline cut from the fractionation column, an
outlet line for the treated light gasoline cut, said zone also comprising
at least one catalyst bed containing 0.1-1% of palladium deposited on a
support, and said apparatus further comprising a line (13) for taking the
stripped and sweetened light gasoline out of the apparatus, and connected
either to the zone (12) or to the zone (9).
